"Hi Peter, After careful consideration we have decided to remove around 8 items of DLC from the Steam store. Having assessed our entire catalogue, we came to the conclusion that these particular add-ons were not in a suitable condition to continue selling and were not up to the standard of some of our more recent releases. Anyone who purchased these add-ons prior to their withdrawal will still be able to access and use them in game though."
My question is, why not just lower the sale price instead of remove it altogether... they're screwing over a crap-ton of folks who want to run workshop items for which the removed content are dependencies but for some reason have not purchased that DLC up to this point.